Gas-engine



(No Model.)

T. H. 8v J. T. H. PAUL.

GAS ENGINE.

No. 530,237. Patented Dec. 4, 1894.

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THOMAS H. PAUL AND JOHN THOMAS H. PAUL, OF FROSTBURG, MARYLAND.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 530,237, dated December 4, 189 4,

Application tiled December l2, 1,893. Serial No. 493,457. (No model.)

To all whom t may concern:

Be it known that We, THOMAS H. PAUL and `JOHN THOMAS H. PAUL, citizens of the United States, residing at Frostbnrg, in the county of Allegany and State of Maryland, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

It is the object of ourinvention to provide a gas engine having a simple and effective form of valve mechanism for controlling the same and with reference tothe valve mechanism we aim to avoid complication of parts, to render the exhaust quick and certain of action and to operate both the gas and ignition valves from the same rocker mechanism comprising two rocker shafts, operated from eccentrics on the engine shaft.

In the drawings-Figure 1, is a perspective View ofthe engine. Figs. 2 and 3 are delrail views relating to the valve mechanism.

The general form of the engine is the same as is well known. The exhaust valve box is attached at the rear cylinder head and contains the usual form of valve as shown in dotted lines. The stem 1 extends down to connect with the lever 2 carried by the rocker shaft 3 journaled in a brackett at the end of the cylinder. This shaft has a crank arm on its end outside the bracket and this is connected by an eccentric rod 5 with an eccentric 6 on the shaft 8 driven from the crank shaft of the engine by suitable gearing. Not shown. The valve lever 2 is connected with the rocker shaft at the upper surface thereof so that the full effect of the movement is given to the valve and the action thereof is sensitive and quick. The rocker shaft 3, is hollow and through it another shaft 10 extends and this is connected with a second eccentric 11 through a connecting rod 12 and crank arm 13. These two shafts arranged in the peculiar manner shown constitute what may be termed a compound rocker shafting. The second shaft carries the cams let-15 for operating both the gas inlet valve and the ignition valve. The stem of the gas inlet valve is shown at 16 and the stem of the ignition Vtern and that shown is of the ball type.

- shaft 10. A similar lever 2l operated by the cam 15 is connected with the stem of theig nition valve to operate it and these cams are constructed and arranged to operate the Valves in proper order and at proper times. All of these parts are carried at one end of the cylinder, the arrangement being both compact and simple. The same bearing serves for both the shafts and the same bracket supports all the parts. The governor shown at .5 has abell crank lever 26 pivoted in a bracket or arm 26X the long arm of which extends down and engages the cam of the gas valve so that it will shift the same laterally on its shaft out of line with the cam leverand thus miss the inlet of one charge of gas when the engine runs above a predetermined speed. The governor may be of any approved {gte provide a latch 27 for holding the ignition valve open when the engine is running at full speed.

It will be understood that we do not limit ourselves to the precise arrangement of the rocker shafting, that is, one `extending through the other as the shafts may be arranged separately and accomplish the same purpose though we prefer the arrangement shown as being the simplest and most effective. The cams on the cam shaft are arranged in reversed position with relation to each other so that as the shaft rocks one way it operates one valve for instance, the gas inlet valve, and when it rocks `the other Way the other cam acts to open the ignition valve.

We claim-- 1. In combination in a gas engine, the gas inlet valve, the ignition valve, the means for operating them and the latch for holding the ignition valve open in ignitible position, substantially as described.

2. In combination in a gas engine, the cylinder, the inlet, exhaust and ignition valves, the rocker shafting comprising the two shafts one of which passes through the other, the

arms on said shafts one outside the other, the eccentric rods connected thereto, the erm on one of said shafts connected to the exhaust Valve and the two cams on the other shaft reversed in position relatively to each other and the levers operated alternately by the said cams and connected to the inlet and ignition valves, substantially as described.

In testimony whereof We aix our signatures in presence'of two witnesses.'

THOMAS I-I. PAUL. J. THOMAS H. PAUL.

Witnesses:

JOHN GOLDSWORTHY, THos. G. PORTER. 

